Muffler.



F. LOWER.

MUFLEB..

APPLICATION NLB man, 1911,. v 4

Patented Jail. 27, 1 914.

2 SHEETS-SHEET 1.

25% am '1 mm,

E. LOWER.

MUFFLER.

APPLICATION FILED AUG.14, 1911,

l 085 27 6. Patented Jan 27, 1914 {SHEETS-SHEET 2.

'UNITED STATESn PATENT OFFICE.

FRANK LOWER, OF LITTLE ROCK, ARKANSAS, ASSIGNOR 0F ONE-HALF T0 COLEMAN M. BRADLEY, 0F WILLARD, MISSOURI.

MUFFLER.

Specification of Letters Patent.

Patented Jan.27,1914.

Application filed August 14, 1911. Serial No. 643,924.

To all tULo/nt it may concer/n..

Be it known that I, FRANK Loivnn, a citizen oflthe United States, residing at Little Rock, :in the county of Pulaski and State of Arkansas, have invented certain new and useful Improvements in Mutilersgand l do hereby declare the following to be a t'ull, clear, and exact description of the invent-ion, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to inutilers for use with internal combustion engines and contemplates an apparatus for reducing the noise and certain other disadvantages incident thereto. t

The principal object ot my invention is to provide a, muffler designed especially for hydrocarbon engines having means i'or reducing the back-pressure produced therein, which is caused by the expansion of the hot gases as theyesca pe from the cylinder ot' the engine.

Another object of my invention is to provide, in combination with the multler, a means for cooling the burned products oi" combustion, as well as the inutlier.

Another object of my invention is to pro-- vide a means combined with the inutiler tor f aiding in the expulsion of the wasted gases therefrom, thereby preventing the gases from being backed up in the nndllcr and choking the exhaust valves and conduits.

Figure l is a side elevation of my improved inuller; Fig. 2 is a central vertical sectional view of my invention illustrating the arrangement of the exhausting ians relative to the mutller casing; Fig. 3 is a sectional view taken on the line 3-3 oit Fig. l, and showing the construction of the primary exhausting and pressure reducing fan, and 17 ig. i is asectional view taken on the line 4;--1- of Fig. l illustrating the construction of the other exhausting secondary fan.

Referring' noiv to the drawings by nu morals of reference, representing correspending parts throughout the several tigures, l indicates a mutller comprising a cylindrical casing having secured at the lower end thereof, by rivets or other fastening means l, a closing head 9. provided with a centrally located opening 3 to'receive one end of nipple Ll which conducts the burned gases into the muilier from the exhaust pipe et leading from the cylinder of a gas engine (not shown). Surrounding the said cylindrical niutlier casing l and concentric therewith is a water jacket 5 consisting of a cylindrical shell or casing 6 having at the lower end thereof, a head or closure Ilalso provided with a centrally arranged opening 8 in alinenient with `the said opening 3 in the head of the member l, to receive the other end of the nipple 4 ivherehy the said gases are conveyed through the space ot channel 9 which received the cooling ivater. Suitable fastening means for either end ot the nipple 4 are provided, the saine consisting of Washers or nuts l() and lO, the latter being further secured'by a loc-k nul ll. A feed pipe l2`leads lo the loiver portion oi the ivater jacket 5 for supplying cold water thereto, while an out.- let pipe l2 leads iroin the upper portion of said water jacket tor drawing ott' the Water atter it has become heated by contact with the walls et the muffler l.

Airraoged within the upper portion ot' the casing and secured to the top of the xnulier l is a priinam` centrifugal fan 14, inclosed within a casing l, the lower portion of the latter constituting a closure 1G for that end ot the said nudl'ler to which it is attached, said closure lb being provided ivith a centrally arranged openingV 1T through which the bot. gases escapo i'roin the muiller into the path ol' the vanos or blades oi' said tan. said opei'iing l? being provided with a raised bridge lf`I forming the bearing 'l'or one'` cud ot' the arbor or spindle i9 passing tlnliough and su} iporing the hub oi' the ian 1.4. l 'lLhe other end oi2 the arbor or spindle is suitably journaled in the casing l5. The fan casing l5 is provided with au opening 2l in ilie periphery thereof from which leads a conduit 22 :ulapled to carry the gases thrown by centrifugal torce ot the 'i'au lai, from thez'casing i3 into the path oi rotation of a secondary ian QS. This izan Q3 is inclosed in a casing 2l, similar in character and design lo the casing' al 'eady l'ucntioned, consisting of separable shells` secured together by rivets or other suitable fastening means 2li', a portion ot' which casing constitutes the closing head ior the other end of the cylimlrical shell or casing 6, and said closing head having an opening` 2 therein leading vfrom the conduit 22 to the tan chamber 24. The fan 23 is mounted upon a hub 25 through which passes the arbor or spindle 19, a single shaft serving the purpose of securing both fans,

whereby said. fans l-.t and are rotatetl simultaneously through the medium of suit able driving newer trammittecto the arbor or spindle lr i pullejT or sprocket Wheel 2'4" 5 and belt or c n rthe tan chamber is provided. wite an outlet Q9 to conduct the ,gases olf combustion to the atmosphere. A suitable iui water coolii system. to promote the more i0 thorough circulation ofi the cooling` water therethrotwh. l

.ion o1" n'iy invention. is as tolses ol combustion escape from the cylinder the gas engine, passing thrcugl'i 4t anti nipple -l into the muliier l, Vthere coming` into contact with the Water cooled Walls therco't, they con tractctl causi e a partial vacuum. l have @ruvido l ccntrirugal fans which, rotating at a suitalre determined rate et speed, cause the l to be sucltctl into their re ""ltes up the exhaustv charge centriifucail force throws it into the conduit or channel 22 from whence it passes to the sccontflary tan 23, saicl fan l-l at the time further reducing the pressure thin the muiiier l so that the following eX- haust charge trom the engine will not he obte structed. in its passagethereto. By the time the gases have i fachetl the secondary fan 23, they will have substantially been reduced to their minimum. degree o contraction, and the pressure having been reduced and practicelljyY elin'iinatetl, the function of the fan 23 will he simply to expel the gases through the outlet 28 by centrifugal .torce into the atmosphere, .noiselessly anti, in a cooled condition. rihe primari;7 tan lll. is water cooled. prevento inn' excessive heating1 there and. further tally cooling the ot' combustion rc they are allowed to entel. the sec Jfan. is obvious that rarious changes may-.lee e in the conetruetion of my apparat-us,

may he inclutiecl in the ,are

within the scope of the following claims which :Corin a partot' this specification, and to all such mociilications and changes I eX- tend. my claim and desire protection.

Having thus 'fully vdescribed this invention, what l claim as new and desire to se cure by Letters .Patent is:

l. i inuler comprising in combination, a multler casing` a Water jacket casing surrounding the mutller casing and concentric ther-eretti, means t'or closingone end of the inutlier casing and the Water jacket casing, a priniary centrifugal tan Within the Water jacket casing, means 'tor inclosing said tan and supporting` the same within the inutllcr casing, a secondary centrifugal lian supportct'l upon the water jacket casing, a casing for said secondary tan, an arbor or spindle passing` through the of Jach tan to provide a hearing therefor, and means ot' communication between the first and second named fan i chambers.

A device ot' the class set forth, comprising a multlcr casing, a water jacket casing surrounding said inutller easing anti providing a water circulatingchannel, means for causing rthe circulation of Water through .said Water channel, a nipple passing through said channel'and connected at each end with the water jacket casing and the muller easing respectively, a water cooled fan supported formotation uponsaid muffler easing within thewater acket casing, a chamber inclosingsaid lian, a second fan mounted for rotation upon the top ot the water jacket casino, a chamber inc'losing,Y said fan, a conduit connecting the two named fan chambers, and an outlet connected and leading fromv thesecond nainefl tan chamber.

In testimony whereof l aiiX my signature in presence of two Witnesses.

y FRANK LOVE/.El

Vitnesses (los. VAN Resonanzen, Trios. A. Gontran. 

